Macbook all screwy..

within the past few weeks i've been having a few problems with my 13'' 2009 UNI Macbook.
For some reason the dock wants me to double click to change apps rather than the usual single click, also because of this the four-finger expose swipe no longer works(it wants me to double click but the screen dissapears after one click w/o changing progeams)

I really hope i changed some setting in my preferences and that im not just the only person to get an iVirus

I work with these guys and haven't seen any issue with the trackpads, the only things i hear are praise. The connection could be the airport card. If its a 2009 model its still under its 1 year warranty. Take it to the apple store, its under warranty don't mess with it to much. That is why you have a warranty.

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